Tool retainer



Feb. 7, 1928. 1,658,414 E. PEN BE RTHY TOOL RETAINER Filed Sept. 5, 1921 2 Sheets-Sheet 1 $972655 Park/6A illlll" Feb. 7, 1928.

1,658,414 E. PENBERTHY TOOL RETAINER Filed Sept. 5. 1921 2 Sheets$heet 2 & Q k? Z wi PU U 4 Z a A Z m tool and retainer. I v

Figure 51s an elevation ot the sheet metal Patented Feb. 7,1928.

UNITED STATE A v 155 414 PATENT O FFICR nnnns'r rENBnR'rHY, or nntrnorn nronrsamnssienonmo oH oAGornnUMA'rio TOOLCOMPANY, on NEW ,YORK, N. Y., A CORPORATION or NEW JERSEY.

'rooiz RETAINER.

Application filed September 3, 1921. Serial No. 498,500.

The invention relates to tool retainers more particularly designed for use 1n. connection with rock drills and functioning to,

Figure 1 is aside "ele ation of a rock drill to which my improvement is applied. Figure 2 is across section substantially on line 22 Figure 1,1 showing the retainer in locked engagement wlth the 'ClTClll-StQIlL' Figure 3 is a longitudinal-section through a portion of the tool showing the retainer in elevation. 7

Figure 4- is a bottom plan view of the blank from which the retainer is formed.

A isa pneumatic tool of any suitable construction. 13 is the drill steel having the polygonal portion Cfor engaging a rotary socket D, andE is the shank of the piston which impinges against the portion G. The

thrust of the tool when pressedtoward the work is transmitted from the piston directly to the drill steel. A collar Fupon the drill steel cooperates with the retainer to prevent disengagementotthe steel when the tool is withdrawn fromthe work.

To form a simple construction of retainerI employ a sheet metal blank Gr, substantially of the form shown in Figure 5. The central portion H of this blank is bent to 01 1 yokefor embracing the steel and forming a shoulder for engaging the collar F to hold the same from outward movement-.-

Upon the opposite side of this central portion the blank is return bent, as indicated at I and I, and arms J I J extend upward from the return bent portionson diametrically 0 posite sides of the tool. The upper ends 0 these arms are apertured at K and engage trunnions L upon a collar M, which collar is sleeved upon the lowerend portion N of the tool and is resiliently supported vsaid collar when the latter is given a partial rotation and thusabutment is secured from disengagement. l

7 tool.

Fromithe parts thus far described it will 7 be understood that the'armslJ J are formed to swing upon the trunnlonsL so as to move the yoke either into a position for en: T'gagement with the collar For into position where it will clear said; collar.

these positions the retainer isfheldirom accidental displacement by hearing against lugs T on the tool casingandto this endthe upper ends of the arms J have angular faces U U torengaging. said lugs in the respee tive positions of adjustment; The resilient pressure of the spring 0 holds thearms against said lugs but permits the swinging o the retainer by theappli cation of lateral pressure thereto. from accidentally swinging out of engage- To preventthe retainer ment with the drill'steel when an outward pull; is exerted thereon, locking shoulders Y V"'are formed on the yoke H. These; as

shown, are formed by portions W W which are of greater widththan thecentralporwhen the tool is drawn outward the collar P will slide from its normal position against the'socket D into position where it bears against the yoke H and in this position' the shoulders V V, willprevent swing- In each of ing of the yoke into disengaged position,

on. the other hand, when the collar is in normal position there is nothing to interfere with. the outward swing of the retainer so that the steel may bedetached orreplaced at any time. 7 j -What I claim as my invention is:

1. The combination with a socket holder,

a socket and a tool having a shank engaging saidsocket and a collar for hearing against the" end of the same, of a retainer formed said U-shaped portion having its ends of greater width to form shoulders for engag- 5 ing the periphery of said collarto prevent ofsaid socket holder and ivotallymounted upon the same to permit 0 swinging of said retainer into and out of engagement with the the opposite side of the axis of said shank,

and the portions beyond said central bent portion being return-bent to arrange said parallel arms with their flat "faces in parallelism and embracing said socket holder, and pivots mounted on said socket holder and projecting laterally therefrom to engage apertures in the upper ends of said arms.

'3. In a device of the class described, the

, combination with a tool holder and a tool havinga collar, of a retainer blanked from sheet metal having a central portion bent to embrace the tooland forming a bearing for engaging said collar, said central portion having adjacent parts of greater width forming stops for engaging the periphery of said collar on the opposite side of the axis of said tool, said retainer naving arms on tending from said central portion on opposite sides of said holder, a collar sleeved over said holder 'with which said retainer arms have pivotal connection, lugs on said holder extending outwardly .thereot,the ends of said retainer arms extending beyond said sleeved collar and having flats arranged to engage the lugs on said holder, and resilient means engaging said sleeved collar for yieldingly retaining said arm ends against said lugs whereby said retainer is held in operative or in inoperative position.

4. In a device of the class described, the combination with a tool holder and a tool having a collar, of a retainer blanked from sheet metal having a central portion bent to embrace the tool and forming a bearing for engaging said collar, said central portion having adjacent parts of greater width forming stops for engaging the periphery of said collar on the opposite side of the axis of said tool, said retainer having arms ex tending from said central portion on opposite sides of said holder, a collar sleeved over said holder with which said. retainer arms ERNEST PENBERTHY. 

